DD--that's an *awesome* sub setup.
Yeah.
I suppose that you can also see that I am never satisfied and I am still exploring, even at my age.
In my back yard I have a four hundred pound twenty eight cubic foot enclosure that should do a fine job of activating the back yard with awesome sound. (I think I mentioned it is a five way). Dual eighteens, dual fifteens, dual twelves, single four inch horn and dual super tweet bullets. It is tri-amped - the twelves and horns are on one signal above twelve hundred Hz (crossed passively, three hundred watts per side). The lowers are all crossed electronically, using dual DbX . Two thousand watts on the eighteens and an additional two thousand watts on the the fifteens and one thousand watts on the twelves plus the three hundred watts on the uppers.
Only thing I regret at this point is that I did not build into the system a motor with which to move the enclosures around to get the best sound.
... but see. I am still exploring.
Unfortunately, now I am out of unused Crowns for power.